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中频感应电炉温度控制存在严重的滞后现象,传统的PID温度控制出现超调量较大、温度调整周期过长等问题。采用改进型史密斯补偿控制系统后,克服纯滞后时间对控制系统的影响。通过MATLAB对控制系统进行仿真,发现温度控制变得更加精确、平稳,缩短系统调整至稳态所需时间,控制过程中的超调量明显降低。系统的整体抗干扰性和鲁棒性得到进一步提高,满足了生产中对中频感应电炉温度控制各项参数指标的要求。
Intermediate frequency induction furnace temperature control has serious lag phenomenon, the traditional PID temperature control overshoot large temperature adjustment period is too long and so on. The use of improved Smith compensation control system to overcome the impact of pure lag time on the control system. The simulation of the control system by MATLAB shows that the temperature control becomes more accurate and steady, shortening the time required for the system to adjust to the steady state, and the overshoot in the control process is obviously reduced. The overall anti-interference and robustness of the system are further improved, meeting the requirements of various parameters of the temperature control of medium frequency induction furnace in production.